facebook question of the day. >> what is your advice to lawmakers as they debate the gun control laws. join the heated discussion on our fan page and we're going to read your responses on the air. as she just alluded to that assault weapons ban was from 1994 to 2004. if you look at the long-term effects, they said there was no change, maybe a small decrease in the mass shootings, but overall, not a decrease in violence. >> the jury is out. yesterday, according to a 2004 university of pennsylvania study about the ban, the number of people killed in mass shootings did go down in the years the ban was in effect except for '99. that was columbine, as we all remember. but because mass shootings are relatively rare, it's difficult to tell whether this was caused by the ban. the president has given a lot of lip service to gun control because of the national outrage. but this is a president who has been much more friendly to gun owners than gun control advocates.